<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>分区标签学习</title>
</head>
<body>
<!-- 块级元素独占一行 -->
<div>块级标签1</div>
<div>块级标签2</div>
<div>块级标签3</div>
<!-- 行内元素共占一行 -->
<span>行级标签1</span>
<span>行级标签2</span>
<span>行级标签3</span>
</body>
</html>